diff --git a/requirements.txt b/requirements.txt
index 2bbdc91..077bcd9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ keepalive==0.5
 MarkupSafe==0.23
 pyaml==18.11.0
 pyparsing==2.0.7
-PyYAML==4.2b1
+PyYAML==5.4
 rdflib==4.2.2
 rdflib-jsonld==0.4.0
 requests==2.20.0